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Gunaseelan S, Ariffin MZ, Khanna S, Ooi MH, Perera D, Chu JJH, Chua JJE. Pharmacological perturbation of CXCL1 signaling alleviates neuropathogenesis in a model of HEVA71 infection. Nat Commun 2022; 13:890. [PMID: 35173169 PMCID: PMC8850555 DOI: 10.1038/s41467-022-28533-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 01/27/2022] [Indexed: 12/14/2022] Open
Abstract
Hand, foot and mouth disease (HFMD) caused by Human Enterovirus A71 (HEVA71) infection is typically a benign infection. However, in minority of cases, children can develop severe neuropathology that culminate in fatality. Approximately 36.9% of HEVA71-related hospitalizations develop neurological complications, of which 10.5% are fatal. Yet, the mechanism by which HEVA71 induces these neurological deficits remain unclear. Here, we show that HEVA71-infected astrocytes release CXCL1 which supports viral replication in neurons by activating the CXCR2 receptor-associated ERK1/2 signaling pathway. Elevated CXCL1 levels correlates with disease severity in a HEVA71-infected mice model. In humans infected with HEVA71, high CXCL1 levels are only present in patients presenting neurological complications. CXCL1 release is specifically triggered by VP4 synthesis in HEVA71-infected astrocytes, which then acts via its receptor CXCR2 to enhance viral replication in neurons. Perturbing CXCL1 signaling or VP4 myristylation strongly attenuates viral replication. Treatment with AZD5069, a CXCL1-specific competitor, improves survival and lessens disease severity in infected animals. Collectively, these results highlight the CXCL1-CXCR2 signaling pathway as a potential target against HFMD neuropathogenesis.
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Affiliation(s)
- Saravanan Gunaseelan
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Department of Microbiology and Immunology, National University of Singapore, Singapore, 117597, Singapore
- LSI Neurobiology Programme, National University of Singapore, Singapore, 117456, Singapore
| | - Mohammed Zacky Ariffin
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Sanjay Khanna
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- LSI Neurobiology Programme, National University of Singapore, Singapore, 117456, Singapore
| | - Mong How Ooi
- Department of Paediatrics, Sarawak General Hospital, Kuching, Sarawak, Malaysia
- Institute of Health and Community Medicine, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
| | - David Perera
- Institute of Health and Community Medicine, Universiti Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
| | - Justin Jang Hann Chu
- Department of Microbiology and Immunology, National University of Singapore, Singapore, 117597, Singapore.
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, 138673, Singapore.
- Infectious Disease Translational Research Programme, National University of Singapore, Singapore, 117597, Singapore.
| | - John Jia En Chua
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- LSI Neurobiology Programme, National University of Singapore, Singapore, 117456, Singapore.
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, 138673, Singapore.
- Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
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Zarif F, Anasir MI, Koh JX, Chew MF, Poh CL. Stability and antiviral activity of SP40 peptide in human serum. Virus Res 2021; 303:198456. [PMID: 34314773 DOI: 10.1016/j.virusres.2021.198456] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 04/29/2021] [Accepted: 05/15/2021] [Indexed: 12/27/2022]
Abstract
Enterovirus A71 (EV-A71) is one of the main causative agents of hand, foot and mouth disease (HFMD). SP40 peptide was previously identified to inhibit EV-A71 strains from genotypes A, B and C. However, the stability and antiviral activity of SP40 peptide in human serum are yet to be established. To address this, we evaluated the stability and anti-EV-A71 activity of SP40 peptide after incubation in 25 % human serum. Reverse-phase high-performance liquid chromatography (RP-HPLC) and liquid chromatography-mass spectrometry (LC/MS) were utilized to evaluate serum stability and cleavage patterns of SP40 peptide after incubation in human serum. Cell protection assay was used to evaluate the anti-EV-A71 activity of SP40 peptide after incubation in human serum and to identify the minimal active sequence of SP40 peptide that retained antiviral activity. The results showed that the SP40 peptide was stable in human serum with 56 % of the full-length SP40 peptide being detected after 48 h incubation in human serum. The SP40 peptide was mainly cleaved by exopeptidases and no endoprotease recognition sites were identified within the SP40 peptide. Cell protection assays revealed that the SP40 peptide retained substantial activity after 24 and 48 h incubation in human serum. Furthermore, the data revealed that three amino acids at the N-terminus and one amino acid at the C-terminus of the SP40 peptide were dispensable for its antiviral activity. Importantly, the four truncated peptides displayed better potency than the full-length SP40 peptide. Overall, this study provided insights into the stability and activity of SP40 peptide in human serum and will facilitate the development of SP40 peptide as an anti-EV-A71 agent.
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Affiliation(s)
- Faisal Zarif
- Centre for Virus and Vaccine Research, Sunway University, Bandar Sunway, Malaysia; School of Medical and Life Sciences, Sunway University, Bandar Sunway, Malaysia
| | - Mohd Ishtiaq Anasir
- Centre for Virus and Vaccine Research, Sunway University, Bandar Sunway, Malaysia; School of Medical and Life Sciences, Sunway University, Bandar Sunway, Malaysia; Virology Unit, Infectious Disease Research Center, Institute for Medical Research, National Institutes of Health, Ministry of Health Malaysia, Selangor, Malaysia
| | - Jia Xuen Koh
- Centre for Virus and Vaccine Research, Sunway University, Bandar Sunway, Malaysia; School of Medical and Life Sciences, Sunway University, Bandar Sunway, Malaysia
| | - Miaw-Fang Chew
- Centre for Virus and Vaccine Research, Sunway University, Bandar Sunway, Malaysia
| | - Chit Laa Poh
- Centre for Virus and Vaccine Research, Sunway University, Bandar Sunway, Malaysia; School of Medical and Life Sciences, Sunway University, Bandar Sunway, Malaysia.
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Gunaseelan S, Wong KZ, Min N, Sun J, Ismail NKBM, Tan YJ, Lee RCH, Chu JJH. Prunin suppresses viral IRES activity and is a potential candidate for treating enterovirus A71 infection. Sci Transl Med 2020; 11:11/516/eaar5759. [PMID: 31666401 DOI: 10.1126/scitranslmed.aar5759] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 11/12/2018] [Accepted: 10/09/2019] [Indexed: 12/24/2022]
Abstract
Human enterovirus A71 (HEVA71) causes hand, foot, and mouth disease (HFMD) in young children and is considered a major neurotropic pathogen but lacks effective antivirals. To identify potential therapeutic agents against HFMD, we screened a 502-compound flavonoid library for compounds targeting the HEVA71 internal ribosome entry site (IRES) that facilitates translation of the HEVA71 genome and is vital for the production of HEVA71 viral particles. We validated hits using cell viability and viral plaque assays and found that prunin was the most potent inhibitor of HEVA71. Downstream assays affirmed that prunin disrupted viral protein and RNA synthesis and acted as a narrow-spectrum antiviral against enteroviruses A and B, but not enterovirus C, rhinovirus A, herpes simplex 1, or chikungunya virus. Continuous HEVA71 passaging with prunin yielded HEVA71-resistant mutants with five mutations that mapped to the viral IRES. Knockdown studies showed that the mutations allowed HEVA71 to overcome treatment-induced suppression by differentially regulating recruitment of the IRES trans-acting factors Sam68 and hnRNPK without affecting the hnRNPA1-IRES interaction required for IRES translation. Furthermore, prunin effectively reduced HEVA71-associated clinical symptoms and mortality in HEVA71-infected BALB/c mice and suppressed hepatitis C virus at higher concentrations, suggesting a similar mechanism of prunin-mediated IRES inhibition for both viruses. These studies establish prunin as a candidate for further development as a HEVA71 therapeutic agent.
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Affiliation(s)
- Saravanan Gunaseelan
- Department of Microbiology and Immunology, National University of Singapore, Singapore 117597, Singapore
| | - Kai Zhi Wong
- Department of Microbiology and Immunology, National University of Singapore, Singapore 117597, Singapore
| | - Nyo Min
- Department of Microbiology and Immunology, National University of Singapore, Singapore 117597, Singapore
| | - Jialei Sun
- Department of Microbiology and Immunology, National University of Singapore, Singapore 117597, Singapore
| | | | - Yee Joo Tan
- Department of Microbiology and Immunology, National University of Singapore, Singapore 117597, Singapore
| | - Regina Ching Hua Lee
- Department of Microbiology and Immunology, National University of Singapore, Singapore 117597, Singapore
| | - Justin Jang Hann Chu
- Department of Microbiology and Immunology, National University of Singapore, Singapore 117597, Singapore. .,Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore 138673, Singapore
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Min N, Sakthi Vale PD, Wong AA, Tan NWH, Chong CY, Chen CJ, Wang RYL, Chu JJH. Circulating Salivary miRNA hsa-miR-221 as Clinically Validated Diagnostic Marker for Hand, Foot, and Mouth Disease in Pediatric Patients. EBioMedicine 2018; 31:299-306. [PMID: 29754884 PMCID: PMC6014581 DOI: 10.1016/j.ebiom.2018.05.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/24/2018] [Accepted: 05/03/2018] [Indexed: 12/01/2022] Open
Abstract
Enhancements in the diagnostic capabilities using host biomarkers are currently much needed where sensitivity and specificity issues plague the diagnosis of Hand, Foot and Mouth Disease (HFMD) in pediatrics clinical samples. We investigated miRNome profiles of HFMD saliva samples against healthy children and developed miRNA-based diagnosis models. Our 6-miRNA scoring model predicted HFMD with an overall accuracy of 85.11% in the training set and 92.86% in the blinded test set of Singapore cohort. Blinded evaluation of the model in Taiwan HFMD cases resulted in 77.08% accuracy with the 6-miRNA model and 68.75% with the 4-miRNA model. The strongest predictor of HFMD in all of the panels, hsa-miR-221 was found to be consistently and significantly downregulated in all of our HFMD cohorts. This is the first study to prove that HFMD infection could be diagnosed by circulating miRNAs in patient's saliva. Moreover, this study also serves as a stepping stone towards the future development of other infectious disease diagnosis workflows using novel biomarkers. Targeted salivary miRNome profiling was conducted between Hand Foot and Mouth disease patients and healthy individuals. HFMD diagnosis models were established with training data from Singapore HFMD cohort using the support vector machine. The models were also validated blindly using the testing data from Singapore HFMD cohort and the entire Taiwan HFMD cohort.
Using saliva as the medium for diagnosis of human diseases has been a long dream for doctors and patients. In this research article, we developed a rapid test for detecting hand foot and mouth disease using molecules known as miRNA in saliva. We created a mathematical model to detect a specific pattern of miRNA response of the HFMD infection to identify HFMD infected patients. Our model can accurately distinguish HFMD patients from the healthy person by 92.86% in the blinded testing set of Singapore HFMD cohort.
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Affiliation(s)
- Nyo Min
- Laboratory of Molecular RNA Virology and Antiviral Strategies, Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University Health System, 5 Science Drive 2, National University of Singapore, 117597, Singapore.
| | - Previtha Dawn Sakthi Vale
- Laboratory of Molecular RNA Virology and Antiviral Strategies, Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University Health System, 5 Science Drive 2, National University of Singapore, 117597, Singapore.
| | - Anng Anng Wong
- Infectious Disease Service, Department of Pediatric Medicine, KK Women's and Children's Hospital, 100 Bukit Timah Road, 229899, Singapore.
| | - Natalie Woon Hui Tan
- Infectious Disease Service, Department of Pediatric Medicine, KK Women's and Children's Hospital, 100 Bukit Timah Road, 229899, Singapore.
| | - Chia Yin Chong
- Infectious Disease Service, Department of Pediatric Medicine, KK Women's and Children's Hospital, 100 Bukit Timah Road, 229899, Singapore.
| | - Chih-Jung Chen
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial and Children's Hospital, Linkuo 33305, Taiwan
| | - Robert Y L Wang
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Memorial and Children's Hospital, Linkuo 33305, Taiwan; Department of Biomedical Sciences, College of Medicine, Chang Gung University, TaoYuan 33302, Taiwan.
| | - Justin Jang Hann Chu
- Laboratory of Molecular RNA Virology and Antiviral Strategies, Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University Health System, 5 Science Drive 2, National University of Singapore, 117597, Singapore; Collaborative and Translational Unit for HFMD, Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore.
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Oslovsky VE, Drenichev MS, Sun L, Kurochkin NN, Kunetsky VE, Mirabelli C, Neyts J, Leyssen P, Mikhailov SN. Fluorination of Naturally Occurring N⁶-Benzyladenosine Remarkably Increased Its Antiviral Activity and Selectivity. Molecules 2017; 22:molecules22071219. [PMID: 28726764 PMCID: PMC6152005 DOI: 10.3390/molecules22071219] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/13/2017] [Accepted: 07/17/2017] [Indexed: 11/16/2022] Open
Abstract
Recently, we demonstrated that the natural cytokinin nucleosides N⁶-isopentenyladenosine (iPR) and N⁶-benzyladenosine (BAPR) exert a potent and selective antiviral effect on the replication of human enterovirus 71. In order to further characterize the antiviral profile of this class of compounds, we generated a series of fluorinated derivatives of BAPR and evaluated their activity on the replication of human enterovirus 71 in a cytopathic effect (CPE) reduction assay. The monofluorination of the BAPR-phenyl group changed the selectivity index (SI) slightly because of the concomitant high cell toxicity. Interestingly, the incorporation of a second fluorine atom resulted in a dramatic improvement of selectivity. Moreover, N⁶-trifluoromethylbenzyladenosines derivatives (9-11) exhibited also a very interesting profile, with low cytotoxicity observed. In particular, the analogue N⁶-(3-trifluoromethylbenzyl)-adenosine (10) with a four-fold gain in potency as compared to BAPR and the best SI in the class represents a promising candidate for further development.
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Affiliation(s)
- Vladimir E Oslovsky
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Mikhail S Drenichev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Liang Sun
- Laboratory for Virology and Chemotherapy, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven-University of Leuven, Minderbroedersstraat 10, Leuven 3000, Belgium.
| | - Nikolay N Kurochkin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Vladislav E Kunetsky
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
| | - Carmen Mirabelli
- Laboratory for Virology and Chemotherapy, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven-University of Leuven, Minderbroedersstraat 10, Leuven 3000, Belgium.
| | - Johan Neyts
- Laboratory for Virology and Chemotherapy, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven-University of Leuven, Minderbroedersstraat 10, Leuven 3000, Belgium.
| | - Pieter Leyssen
- Laboratory for Virology and Chemotherapy, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven-University of Leuven, Minderbroedersstraat 10, Leuven 3000, Belgium.
| | - Sergey N Mikhailov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia.
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